Select multiple items from listview and change color of selected item only

Question

I want to make a view where I can select multiple items from listview and also side by side am changing the color of selected list item and saving that item into my arraylis

Answer 1

A correction about the answer given by @JasonRobinson:

if(selectedIds.contains(pos) {
         selectedIds.remove(pos); -> **selectedIds.remove(selectedIds.indexOf(pos));**
     }
     else {
         selectedIds.add(pos);
     }